Journal of Research in Multidisciplinary Methods and Applications

Multi-Scale Feature Fusion Network for Object Recognition in Mountain Farmland Environments

Zhenglong Zhu , Qiang Zhang , Nanqing Zhang — Wed, 15 Jan 2025 00:00:00 +0000

Object recognition in mountainous field environment is a crucial part of intelligent operation. Since the diversity of crops, weeds and other targets in the mountainous field environment, as well as the complexity of scale changes, object recognition faces great challenges. In order to solve these problems, it is particularly critical to effectively fuse global and local multi-scale features. To this end, this paper proposes a three-branch parallel multi-scale feature fusion network (MFFNet) for object recognition in mountain and field environments. The MFFNet contains specially designed global and local feature extraction modules, which can capture the global and local feature information in the image in parallel. In addition, the MFFNet introduces a feature fusion strategy based on channel attention and spatial attention to effectively integrate global and local features with different semantic depths. The experimental results show that our proposed MFFNet is superior to the comparison method in multiple index results on the self-built mountain field environment image dataset.

Investigation in The Close-Ground Characteristics of Torsional Damping Flap

Yuanzhi Qian, Tianjun Zhu, Zunling Du, Zhifeng Wu, Jianguo Liang — Wed, 15 Jan 2025 00:00:00 +0000

Ground effects have a significant impact on road vehicles, particularly on blended wing body and lightweight designs. Racing vehicles participating in the World Solar Challenge fall into this category. A computational fluid dynamics (CFD) simulation was conducted for the NACA 0015 airfoil to investigate the effects of a torsional damping flap with ground effects. The analytical model demonstrated that an 1/4 chord-length torsional damping flap can reduce lift variation by 25%. However, the CFD results showed less efficacy because the analytical model was idealized using a thin plate model under no-slip conditions. In close-ground situations, the lift-alleviation performance of the flap is suppressed at low angles of attack but recovers at higher angles of attack, above 10 degrees. This behavior is attributed to the suppression of flow separation by the torsional damping flap.

The Analysis of Health Literacy Differences Among Junior High School Students in The Plateau Areas of Haidong City and Yushu Tibetan Autonomous Prefecture in Qinghai Province

Chen Yu , Rulin Shi — Wed, 15 Jan 2025 00:00:00 +0000

Health literacy is the foundation of physical education and one of the most important core literacies. Physical health literacy refers to the knowledge and skills that students learn and master about physical health, as well as their awareness and concern for their own physical condition. The survey subjects were junior high school students in Haidong City, Qinghai Province and Yushu Tibetan Autonomous Prefecture in Qinghai Province, and the overall health literacy and health literacy of the two regions were compared through questionnaire survey method and statistical analysis method, and it was concluded that there were significant differences in the overall health literacy between Haidong City and Yushu Tibetan Autonomous Prefecture in Qinghai Province, among which there was no significant difference in personal health information ability and government social support, and there were significant differences in health information characteristics, personal health knowledge and personal characteristics. In addition, the average score of junior high school students in Yushu Tibetan Autonomous Prefecture is higher than that of Haidong City, due to the differences in geographical location, development and related policies, it is hoped that the health literacy of junior high school students in Haidong City will be improved by increasing publicity, organizing learning, participating in practical sports activities, and providing relevant policy support.